The Tileable Blur filter can be utilized to blur already tileable images so that the tileable properties of the layer are not lost after blurring.
Tileable Blur Settings
The Radius slider sets the radius of the blur in the same fashion as the Gaussian Blur IIR , or the Gaussian Blur RLE filters.
This option sets the blur to work on the vertical axis.
This option sets the blur to work on the horizontal axis.
This dropdown box sets the blur type to either IIR or RLE.